Here's how it works: you download the app for free, which comes with one free 50-clue canvas to get you hooked. Then every month they release a new movie-themed canvas with 50 more picture-clues to unravel. Fiendishly clever. It's basically the same marketing policy which has worked so well with crack for decades. But with less harmful societal effects.

The theme of the latest one is sci-fi movies, and you can see a corner of the canvas above. So, for example: see that fruit running down the road? That's a loganberry. Running. What SF movie might that represent? Yep, Logan's Run (ouch!). Get the idea?